Automobile jack



' Aug. 19 1924. 1,505,203

J. H. KERSHNER AUTOMOBILE JACK Filed May 11, 1923 2 Sheets-Shut. 1

Patented Aug. 19, 1924.

JOHNI'IENRY KERSHNER, 0F NORTON, KANSAS.

AUTOMOBILE JACK.

Application filed May 11,

To aZZ whom it may concern:

Be it known that 1, JOHN KERSHNER, a citizen of the United States, residing at Norton, in the county of Norton and State of Kansas, have invented anew and useful Automobile J ack, of which the following is a specification.

This invention aims to provide a simple means whereby an automobile may be employed for driving machinery.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of'that type to which the invention appertains. 1

Vvith the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevation, a device constructed in accordance with the invention, parts being in section; Figure 2 is a top plan wherein parts are broken away; Figure 8 is a cross section on the line 33 of Figure 2; Figure 4 is a section on the line 44 of Figure .2; Figure 5 is a per spective showing one of the bearings; Figure 6 is an elevation showing the nut which is mounted to rock in the bearings delineated in Figure 5; Figure 7 is a rear elevation showing a device constructed in accordance with the invention; Figure 8 is a fragmental perspective view showing a portion of the support; and Figure 9 is a section taken approximately on the line 99 of Figure 7.

The device forming the subject matter of this application includes a base 1 comprising cross sills 2 and 3 wherein longitudinal stringers 4 are superposed, the stringers being connected to the cross sill 3 by securing elements 5, and being connected to the cross sill by U-bolts 6. A standard 7 upstands from the cross sill 2. One end of a downwardly inclined brace 9 is attached at 10 to the standard 7, the other end of the brace being secured at 11. to the cross sill 3. Braces 12 connect the sill 2 withthe stringers 4. Bearing plates 50 are secured at 51 to the standard 7 and 1923. Serial Nb. 638,303.

have shoulders 52 engaging the standard, a rocker 53 is provided and has trunnions 54 journaled in the bearing plates 50. A slot 15 is fashioned in the standard 7 and is located adjacent to the upper end of the standard 7.

The numeral 16 designates a support comprlsing slde beams 17connected by a cross bar 18. The lower ends of radius arms 19 are pivoted at 21, adjustable to the stringers 4, the upper ends of the radius arms being pivoted atg20 to the side beams 17 of the support 16, the radius arms 19 being disposed inpairs, and the stringers 4 and the side beams 17 being located between the radius arms of each pair. To the forward end of each side beam 17 of the support 16, brackets 22 are attached by securing members 23, the brackets having up-turned ends. The securinmembers 23 extend downwardly throug the side beams 17 and hold shims 24 on the lower surfaces of the side beams, the shims 24 being located between certain of the radius arms 19, as shown in Figure 8.

troughshaped bearing 25 is mounted on the lower surface of the cross bar 18 of the support 16 and is provided in its side walls with openings 27, the bearing being connected at 26 to the bar 18. A. nut 29 is located between the side walls of the trough-shaped bearing 25 and has trunnions 28 mounted to rock in the openings 27 Into the nut 29, a screw 30 is threaded, the screw terminating in a crank 21 or other means whereby rotation may be imparted to the screw. The screw 30 is mounted loosely in the rocker 53 and has vertical swinging movement in the slot 15 of the standard. The screw 30 carries a rear abutment 32, adapted to cooperate with the wear plate 14, the screw being supplied, with aforward abutment 33 adapted to coact with the standard 7.

A tubular bearing 34 extends entirely across the base 1 and is held by the U-bolts 6 on the longitudinal stringers 4. cent to its ends, the tubular bearing 34 carries bushings 35 preferably made of antifriction material, a lubricant being sup plied to the bushings 35 through oil cups 36 mounted on the bearings 34, as shown in Figure 4. In the bushings 35 is journaled a shaft 37, the shaft being housed throughout the major portion of its length in the bearing 34. Wheels 38 are secured the like.

In practical operation, the automobile 10 y is moved'to a position above the support 16. Through the instrumentality of the screw and the nut 29, the support 16 may be elevated into the position shown in Figure '1 of the drawings, the up-turned ends of the A brackets'22 engaging the axle casing of the automobile. During the raising of the support as aforesaid, the rear abutment 32on the screw coacts with" the bracket 52 on the standard 7. When the automobile is raised, asaforesaid, the wheels 39 of the automo bile are brought into vcontact with the wheels 38 on the'shaft 37. When rotation is imparted to the automobile wheels 39, by way of the engine which forms part of the vehicle, motion will be transmitted to the shaft 37 andfrom the shaft, the power maybe transmitted to the machinery to be driven, through the instrumentalit-y of the pulley 11 and the belt 42. a

It is to be observed that the weight of v the automobile is not carried directly into the wheels 38 on the shaft 37, the automobile being upheld by the support 16. The support 16 may be carried rearwardly, by rotatingthe screw 30, the wheels 39 of the automobile being engaged with the wheels 39 with a. varying pressure, depending upon the amount of torque which the machinery to be driven imposes on the shaft 37. Owing to this adjustment,, the wear and tear on the tires of the automobilewheels 39 will be decreased appreciably.

Since the nut 29 is mounted'at 28 to swing on the bearing 25 which is carried by the support 16, and in view of the fact that the screw 30 has vertical movement in the slot 15 of the standard 7, the screw will never cramp or bind, during the raising and lowering of the support 16. \Vhen it is desired to lower the automobile wheels 39 into contact with the ground, from the position shown in Figure 1, a reverse rotation may be imparted to the screw 30 by way of the handle 31 and, then, the forward abutment 33 on the screw will ('0- operate with the standard 7 It may occur that, owing to the construction of the automobile, or from some other cause, it may be desirable to elevate the brackets 22 on the side beams 17 of the support 16. Under such circumstances, the shims 24 are moved from the position shown in Figure 8 and are placed between the brackets 22 and the side beams 17 the securing members 23 passing downwardly through the brackets 22, the shims 24 and the side beams 17 of the support 16.

What is claimed is i In a device of the class described, a base frame; a support located thereabove; radius arms pivoted to the frame and to the support; a nut mounted to rock on the support; a screw threaded into the nut: means for mounting the screw on the base frame for rotation and for vertical swinging movement, said means cooperating with the base frame to limit the longitudinal move ment of the screw, the screw constituting means for carrying the support rearwardly. In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

JOHN HENRY KER S'HNER.

Witnesses:

' C. D. Bowna,

L. L. MCHONE. 

